Question
Shalom,
A clean, cold fleishig knife was accidentally used to spread butter. What is the status of this knife? Is it still kosher? If not, is there a way to rekasher it? Thank you for your time.
Kol tuv,
Ariela
Answer
Shalom and thank you for the question.
When a clean (meaty) fleishig dish was used for milky food there might be a problem of taste passing from the dish to the food or the opposite. In general, taste does not pass from food to a dish or vice verse if both are cold.
Therefore the knife is kosher and does not have to be Kasherd, just cleaned well.
This rule has a few exceptions like cutting spicy food. You can expand on the topic at the following response: http://www.yeshiva.co/ask/?id=6365
Rabbi Yisrael Wende
